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shdocvw: Initialize OLEINPLACEFRAMEINFO.cb for IOleInPlaceSite::GetWindowContext.
[wine.git] / server / file.c
blobcca2633c72788a74a57aa3fb1aa808c0c5e8dc02
1 /*
2 * Server-side file management
3 *
4 * Copyright (C) 1998 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <assert.h>
25 #include <fcntl.h>
26 #include <stdarg.h>
27 #include <stdio.h>
28 #include <string.h>
29 #include <stdlib.h>
30 #include <errno.h>
31 #ifdef HAVE_SYS_ERRNO_H
32 #include <sys/errno.h>
33 #endif
34 #include <sys/stat.h>
35 #include <sys/time.h>
36 #include <sys/types.h>
37 #include <time.h>
38 #include <unistd.h>
39 #ifdef HAVE_UTIME_H
40 #include <utime.h>
41 #endif
42 #ifdef HAVE_POLL_H
43 #include <poll.h>
44 #endif
45
46 #include "ntstatus.h"
47 #define WIN32_NO_STATUS
48 #include "windef.h"
49 #include "winternl.h"
50
51 #include "file.h"
52 #include "handle.h"
53 #include "thread.h"
54 #include "request.h"
55 #include "process.h"
56 #include "security.h"
57
58 struct file
59 {
60 struct object obj; /* object header */
61 struct fd *fd; /* file descriptor for this file */
62 unsigned int access; /* file access (FILE_READ_DATA etc.) */
63 mode_t mode; /* file stat.st_mode */
64 uid_t uid; /* file stat.st_uid */
65 };
66
67 static unsigned int generic_file_map_access( unsigned int access );
68
69 static void file_dump( struct object *obj, int verbose );
70 static struct fd *file_get_fd( struct object *obj );
71 static struct security_descriptor *file_get_sd( struct object *obj );
72 static int file_set_sd( struct object *obj, const struct security_descriptor *sd, unsigned int set_info );
73 static void file_destroy( struct object *obj );
74
75 static int file_get_poll_events( struct fd *fd );
76 static void file_flush( struct fd *fd, struct event **event );
77 static enum server_fd_type file_get_fd_type( struct fd *fd );
78
79 static const struct object_ops file_ops =
80 {
81 sizeof(struct file), /* size */
82 file_dump, /* dump */
83 no_get_type, /* get_type */
84 add_queue, /* add_queue */
85 remove_queue, /* remove_queue */
86 default_fd_signaled, /* signaled */
87 no_satisfied, /* satisfied */
88 no_signal, /* signal */
89 file_get_fd, /* get_fd */
90 default_fd_map_access, /* map_access */
91 file_get_sd, /* get_sd */
92 file_set_sd, /* set_sd */
93 no_lookup_name, /* lookup_name */
94 no_open_file, /* open_file */
95 fd_close_handle, /* close_handle */
96 file_destroy /* destroy */
97 };
98
99 static const struct fd_ops file_fd_ops =
100 {
101 file_get_poll_events, /* get_poll_events */
102 default_poll_event, /* poll_event */
103 file_flush, /* flush */
104 file_get_fd_type, /* get_fd_type */
105 default_fd_ioctl, /* ioctl */
106 default_fd_queue_async, /* queue_async */
107 default_fd_reselect_async, /* reselect_async */
108 default_fd_cancel_async /* cancel_async */
109 };
110
111 static inline int is_overlapped( const struct file *file )
112 {
113 return !(get_fd_options( file->fd ) & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
114 }
115
116 /* create a file from a file descriptor */
117 /* if the function fails the fd is closed */
118 struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing )
119 {
120 struct file *file;
121 struct stat st;
122
123 if (fstat( fd, &st ) == -1)
124 {
125 file_set_error();
126 return NULL;
127 }
128
129 if ((file = alloc_object( &file_ops )))
130 {
131 file->mode = st.st_mode;
132 file->access = default_fd_map_access( &file->obj, access );
133 if (!(file->fd = create_anonymous_fd( &file_fd_ops, fd, &file->obj,
134 FILE_SYNCHRONOUS_IO_NONALERT )))
135 {
136 release_object( file );
137 return NULL;
138 }
139 allow_fd_caching( file->fd );
140 }
141 return file;
142 }
143
144 static struct object *create_file_obj( struct fd *fd, unsigned int access, mode_t mode )
145 {
146 struct file *file = alloc_object( &file_ops );
147
148 if (!file) return NULL;
149 file->access = access;
150 file->mode = mode;
151 file->uid = ~(uid_t)0;
152 file->fd = fd;
153 grab_object( fd );
154 set_fd_user( fd, &file_fd_ops, &file->obj );
155 return &file->obj;
156 }
157
158 static struct object *create_file( struct fd *root, const char *nameptr, data_size_t len,
159 unsigned int access, unsigned int sharing, int create,
160 unsigned int options, unsigned int attrs,
161 const struct security_descriptor *sd )
162 {
163 struct object *obj = NULL;
164 struct fd *fd;
165 int flags;
166 char *name;
167 mode_t mode;
168
169 if (!len || ((nameptr[0] == '/') ^ !root))
170 {
171 set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
172 return NULL;
173 }
174 if (!(name = mem_alloc( len + 1 ))) return NULL;
175 memcpy( name, nameptr, len );
176 name[len] = 0;
177
178 switch(create)
179 {
180 case FILE_CREATE: flags = O_CREAT | O_EXCL; break;
181 case FILE_OVERWRITE_IF: /* FIXME: the difference is whether we trash existing attr or not */
182 case FILE_SUPERSEDE: flags = O_CREAT | O_TRUNC; break;
183 case FILE_OPEN: flags = 0; break;
184 case FILE_OPEN_IF: flags = O_CREAT; break;
185 case FILE_OVERWRITE: flags = O_TRUNC; break;
186 default: set_error( STATUS_INVALID_PARAMETER ); goto done;
187 }
188
189 if (sd)
190 {
191 const SID *owner = sd_get_owner( sd );
192 if (!owner)
193 owner = token_get_user( current->process->token );
194 mode = sd_to_mode( sd, owner );
195 }
196 else
197 mode = (attrs & FILE_ATTRIBUTE_READONLY) ? 0444 : 0666;
198
199 if (len >= 4 &&
200 (!strcasecmp( name + len - 4, ".exe" ) || !strcasecmp( name + len - 4, ".com" )))
201 {
202 if (mode & S_IRUSR)
203 mode |= S_IXUSR;
204 if (mode & S_IRGRP)
205 mode |= S_IXGRP;
206 if (mode & S_IROTH)
207 mode |= S_IXOTH;
208 }
209
210 access = generic_file_map_access( access );
211
212 /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */
213 fd = open_fd( root, name, flags | O_NONBLOCK | O_LARGEFILE, &mode, access, sharing, options );
214 if (!fd) goto done;
215
216 if (S_ISDIR(mode))
217 obj = create_dir_obj( fd, access, mode );
218 else if (S_ISCHR(mode) && is_serial_fd( fd ))
219 obj = create_serial( fd );
220 else
221 obj = create_file_obj( fd, access, mode );
222
223 release_object( fd );
224
225 done:
226 free( name );
227 return obj;
228 }
229
230 /* check if two file objects point to the same file */
231 int is_same_file( struct file *file1, struct file *file2 )
232 {
233 return is_same_file_fd( file1->fd, file2->fd );
234 }
235
236 static void file_dump( struct object *obj, int verbose )
237 {
238 struct file *file = (struct file *)obj;
239 assert( obj->ops == &file_ops );
240 fprintf( stderr, "File fd=%p\n", file->fd );
241 }
242
243 static int file_get_poll_events( struct fd *fd )
244 {
245 struct file *file = get_fd_user( fd );
246 int events = 0;
247 assert( file->obj.ops == &file_ops );
248 if (file->access & FILE_UNIX_READ_ACCESS) events |= POLLIN;
249 if (file->access & FILE_UNIX_WRITE_ACCESS) events |= POLLOUT;
250 return events;
251 }
252
253 static void file_flush( struct fd *fd, struct event **event )
254 {
255 int unix_fd = get_unix_fd( fd );
256 if (unix_fd != -1 && fsync( unix_fd ) == -1) file_set_error();
257 }
258
259 static enum server_fd_type file_get_fd_type( struct fd *fd )
260 {
261 struct file *file = get_fd_user( fd );
262
263 if (S_ISREG(file->mode) || S_ISBLK(file->mode)) return FD_TYPE_FILE;
264 if (S_ISDIR(file->mode)) return FD_TYPE_DIR;
265 return FD_TYPE_CHAR;
266 }
267
268 static struct fd *file_get_fd( struct object *obj )
269 {
270 struct file *file = (struct file *)obj;
271 assert( obj->ops == &file_ops );
272 return (struct fd *)grab_object( file->fd );
273 }
274
275 static unsigned int generic_file_map_access( unsigned int access )
276 {
277 if (access & GENERIC_READ) access |= FILE_GENERIC_READ;
278 if (access & GENERIC_WRITE) access |= FILE_GENERIC_WRITE;
279 if (access & GENERIC_EXECUTE) access |= FILE_GENERIC_EXECUTE;
280 if (access & GENERIC_ALL) access |= FILE_ALL_ACCESS;
281 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
282 }
283
284 struct security_descriptor *mode_to_sd( mode_t mode, const SID *user, const SID *group )
285 {
286 struct security_descriptor *sd;
287 size_t dacl_size;
288 ACE_HEADER *current_ace;
289 ACCESS_ALLOWED_ACE *aaa;
290 ACL *dacl;
291 SID *sid;
292 char *ptr;
293 const SID *world_sid = security_world_sid;
294 const SID *local_system_sid = security_local_system_sid;
295
296 dacl_size = sizeof(ACL) + FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) +
297 FIELD_OFFSET(SID, SubAuthority[local_system_sid->SubAuthorityCount]);
298 if (mode & S_IRWXU)
299 dacl_size += FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) +
300 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
301 if ((!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH))) ||
302 (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH))) ||
303 (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH))))
304 dacl_size += FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart) +
305 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
306 if (mode & S_IRWXO)
307 dacl_size += FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) +
308 FIELD_OFFSET(SID, SubAuthority[world_sid->SubAuthorityCount]);
309
310 sd = mem_alloc( sizeof(struct security_descriptor) +
311 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) +
312 FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]) +
313 dacl_size );
314 if (!sd) return sd;
315
316 sd->control = SE_DACL_PRESENT;
317 sd->owner_len = FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
318 sd->group_len = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
319 sd->sacl_len = 0;
320 sd->dacl_len = dacl_size;
321
322 ptr = (char *)(sd + 1);
323 memcpy( ptr, user, sd->owner_len );
324 ptr += sd->owner_len;
325 memcpy( ptr, group, sd->group_len );
326 ptr += sd->group_len;
327
328 dacl = (ACL *)ptr;
329 dacl->AclRevision = ACL_REVISION;
330 dacl->Sbz1 = 0;
331 dacl->AclSize = dacl_size;
332 dacl->AceCount = 1 + (mode & S_IRWXU ? 1 : 0) + (mode & S_IRWXO ? 1 : 0);
333 if ((!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH))) ||
334 (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH))) ||
335 (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH))))
336 dacl->AceCount++;
337 dacl->Sbz2 = 0;
338
339 /* always give FILE_ALL_ACCESS for Local System */
340 aaa = (ACCESS_ALLOWED_ACE *)(dacl + 1);
341 current_ace = &aaa->Header;
342 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
343 aaa->Header.AceFlags = 0;
344 aaa->Header.AceSize = FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) +
345 FIELD_OFFSET(SID, SubAuthority[local_system_sid->SubAuthorityCount]);
346 aaa->Mask = FILE_ALL_ACCESS;
347 sid = (SID *)&aaa->SidStart;
348 memcpy( sid, local_system_sid, FIELD_OFFSET(SID, SubAuthority[local_system_sid->SubAuthorityCount]) );
349
350 if (mode & S_IRWXU)
351 {
352 /* appropriate access rights for the user */
353 aaa = (ACCESS_ALLOWED_ACE *)ace_next( current_ace );
354 current_ace = &aaa->Header;
355 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
356 aaa->Header.AceFlags = 0;
357 aaa->Header.AceSize = FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) +
358 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
359 aaa->Mask = WRITE_DAC | WRITE_OWNER;
360 if (mode & S_IRUSR)
361 aaa->Mask |= FILE_GENERIC_READ;
362 if (mode & S_IWUSR)
363 aaa->Mask |= FILE_GENERIC_WRITE | DELETE | FILE_DELETE_CHILD;
364 if (mode & S_IXUSR)
365 aaa->Mask |= FILE_GENERIC_EXECUTE;
366 sid = (SID *)&aaa->SidStart;
367 memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
368 }
369 if ((!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH))) ||
370 (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH))) ||
371 (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH))))
372 {
373 /* deny just in case the user is a member of the group */
374 ACCESS_DENIED_ACE *ada = (ACCESS_DENIED_ACE *)ace_next( current_ace );
375 current_ace = &ada->Header;
376 ada->Header.AceType = ACCESS_DENIED_ACE_TYPE;
377 ada->Header.AceFlags = 0;
378 ada->Header.AceSize = FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart) +
379 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
380 ada->Mask = 0;
381 if (!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH)))
382 ada->Mask |= FILE_GENERIC_READ;
383 if (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IROTH)))
384 ada->Mask |= FILE_GENERIC_WRITE | DELETE | FILE_DELETE_CHILD;
385 if (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH)))
386 ada->Mask |= FILE_GENERIC_EXECUTE;
387 ada->Mask &= ~STANDARD_RIGHTS_ALL; /* never deny standard rights */
388 sid = (SID *)&ada->SidStart;
389 memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
390 }
391 if (mode & S_IRWXO)
392 {
393 /* appropriate access rights for Everyone */
394 aaa = (ACCESS_ALLOWED_ACE *)ace_next( current_ace );
395 current_ace = &aaa->Header;
396 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
397 aaa->Header.AceFlags = 0;
398 aaa->Header.AceSize = FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) +
399 FIELD_OFFSET(SID, SubAuthority[world_sid->SubAuthorityCount]);
400 aaa->Mask = 0;
401 if (mode & S_IROTH)
402 aaa->Mask |= FILE_GENERIC_READ;
403 if (mode & S_IWOTH)
404 aaa->Mask |= FILE_GENERIC_WRITE | DELETE | FILE_DELETE_CHILD;
405 if (mode & S_IXOTH)
406 aaa->Mask |= FILE_GENERIC_EXECUTE;
407 sid = (SID *)&aaa->SidStart;
408 memcpy( sid, world_sid, FIELD_OFFSET(SID, SubAuthority[world_sid->SubAuthorityCount]) );
409 }
410
411 return sd;
412 }
413
414 static struct security_descriptor *file_get_sd( struct object *obj )
415 {
416 struct file *file = (struct file *)obj;
417 struct stat st;
418 int unix_fd;
419 struct security_descriptor *sd;
420
421 assert( obj->ops == &file_ops );
422
423 unix_fd = get_file_unix_fd( file );
424
425 if (unix_fd == -1 || fstat( unix_fd, &st ) == -1)
426 return obj->sd;
427
428 /* mode and uid the same? if so, no need to re-generate security descriptor */
429 if (obj->sd && (st.st_mode & (S_IRWXU|S_IRWXO)) == (file->mode & (S_IRWXU|S_IRWXO)) &&
430 (st.st_uid == file->uid))
431 return obj->sd;
432
433 sd = mode_to_sd( st.st_mode,
434 security_unix_uid_to_sid( st.st_uid ),
435 token_get_primary_group( current->process->token ));
436 if (!sd) return obj->sd;
437
438 file->mode = st.st_mode;
439 file->uid = st.st_uid;
440 free( obj->sd );
441 obj->sd = sd;
442 return sd;
443 }
444
445 static mode_t file_access_to_mode( unsigned int access )
446 {
447 mode_t mode = 0;
448
449 access = generic_file_map_access( access );
450 if (access & FILE_READ_DATA) mode |= 4;
451 if (access & FILE_WRITE_DATA) mode |= 2;
452 if (access & FILE_EXECUTE) mode |= 1;
453 return mode;
454 }
455
456 mode_t sd_to_mode( const struct security_descriptor *sd, const SID *owner )
457 {
458 mode_t new_mode = 0;
459 mode_t denied_mode = 0;
460 mode_t mode;
461 int present;
462 const ACL *dacl = sd_get_dacl( sd, &present );
463 const SID *user = token_get_user( current->process->token );
464 if (present && dacl)
465 {
466 const ACE_HEADER *ace = (const ACE_HEADER *)(dacl + 1);
467 ULONG i;
468 for (i = 0; i < dacl->AceCount; i++, ace = ace_next( ace ))
469 {
470 const ACCESS_ALLOWED_ACE *aa_ace;
471 const ACCESS_DENIED_ACE *ad_ace;
472 const SID *sid;
473
474 if (ace->AceFlags & INHERIT_ONLY_ACE) continue;
475
476 switch (ace->AceType)
477 {
478 case ACCESS_DENIED_ACE_TYPE:
479 ad_ace = (const ACCESS_DENIED_ACE *)ace;
480 sid = (const SID *)&ad_ace->SidStart;
481 mode = file_access_to_mode( ad_ace->Mask );
482 if (security_equal_sid( sid, security_world_sid ))
483 {
484 denied_mode |= (mode << 6) | (mode << 3) | mode; /* all */
485 }
486 else if (security_equal_sid( sid, owner ))
487 {
488 denied_mode |= (mode << 6); /* user only */
489 }
490 else if ((security_equal_sid( user, owner ) &&
491 token_sid_present( current->process->token, sid, TRUE )))
492 {
493 denied_mode |= (mode << 6) | (mode << 3); /* user + group */
494 }
495 break;
496 case ACCESS_ALLOWED_ACE_TYPE:
497 aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
498 sid = (const SID *)&aa_ace->SidStart;
499 mode = file_access_to_mode( aa_ace->Mask );
500 if (security_equal_sid( sid, security_world_sid ))
501 {
502 new_mode |= (mode << 6) | (mode << 3) | mode; /* all */
503 }
504 else if (security_equal_sid( sid, owner ))
505 {
506 new_mode |= (mode << 6); /* user only */
507 }
508 else if ((security_equal_sid( user, owner ) &&
509 token_sid_present( current->process->token, sid, FALSE )))
510 {
511 new_mode |= (mode << 6) | (mode << 3); /* user + group */
512 }
513 break;
514 }
515 }
516 }
517 else
518 /* no ACL means full access rights to anyone */
519 new_mode = S_IRWXU | S_IRWXG | S_IRWXO;
520
521 return new_mode & ~denied_mode;
522 }
523
524 static int file_set_sd( struct object *obj, const struct security_descriptor *sd,
525 unsigned int set_info )
526 {
527 struct file *file = (struct file *)obj;
528 const SID *owner;
529 struct stat st;
530 mode_t mode;
531 int unix_fd;
532
533 assert( obj->ops == &file_ops );
534
535 unix_fd = get_file_unix_fd( file );
536
537 if (unix_fd == -1 || fstat( unix_fd, &st ) == -1) return 1;
538
539 if (set_info & OWNER_SECURITY_INFORMATION)
540 {
541 owner = sd_get_owner( sd );
542 if (!owner)
543 {
544 set_error( STATUS_INVALID_SECURITY_DESCR );
545 return 0;
546 }
547 if (!obj->sd || !security_equal_sid( owner, sd_get_owner( obj->sd ) ))
548 {
549 /* FIXME: get Unix uid and call fchown */
550 }
551 }
552 else if (obj->sd)
553 owner = sd_get_owner( obj->sd );
554 else
555 owner = token_get_user( current->process->token );
556
557 /* group and sacl not supported */
558
559 if (set_info & DACL_SECURITY_INFORMATION)
560 {
561 /* keep the bits that we don't map to access rights in the ACL */
562 mode = st.st_mode & (S_ISUID|S_ISGID|S_ISVTX);
563 mode |= sd_to_mode( sd, owner );
564
565 if (((st.st_mode ^ mode) & (S_IRWXU|S_IRWXG|S_IRWXO)) && fchmod( unix_fd, mode ) == -1)
566 {
567 file_set_error();
568 return 0;
569 }
570 }
571 return 1;
572 }
573
574 static void file_destroy( struct object *obj )
575 {
576 struct file *file = (struct file *)obj;
577 assert( obj->ops == &file_ops );
578
579 if (file->fd) release_object( file->fd );
580 }
581
582 /* set the last error depending on errno */
583 void file_set_error(void)
584 {
585 switch (errno)
586 {
587 case ETXTBSY:
588 case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break;
589 case EBADF: set_error( STATUS_INVALID_HANDLE ); break;
590 case ENOSPC: set_error( STATUS_DISK_FULL ); break;
591 case EACCES:
592 case ESRCH:
593 case EROFS:
594 case EPERM: set_error( STATUS_ACCESS_DENIED ); break;
595 case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break;
596 case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break;
597 case EISDIR: set_error( STATUS_FILE_IS_A_DIRECTORY ); break;
598 case ENFILE:
599 case EMFILE: set_error( STATUS_TOO_MANY_OPENED_FILES ); break;
600 case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break;
601 case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break;
602 case ESPIPE: set_error( STATUS_ILLEGAL_FUNCTION ); break;
603 case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break;
604 case EIO: set_error( STATUS_ACCESS_VIOLATION ); break;
605 case ENOTDIR: set_error( STATUS_NOT_A_DIRECTORY ); break;
606 case EFBIG: set_error( STATUS_SECTION_TOO_BIG ); break;
607 case ENODEV: set_error( STATUS_NO_SUCH_DEVICE ); break;
608 case ENXIO: set_error( STATUS_NO_SUCH_DEVICE ); break;
609 #ifdef EOVERFLOW
610 case EOVERFLOW: set_error( STATUS_INVALID_PARAMETER ); break;
611 #endif
612 default:
613 perror("wineserver: file_set_error() can't map error");
614 set_error( STATUS_UNSUCCESSFUL );
615 break;
616 }
617 }
618
619 struct file *get_file_obj( struct process *process, obj_handle_t handle, unsigned int access )
620 {
621 return (struct file *)get_handle_obj( process, handle, access, &file_ops );
622 }
623
624 int get_file_unix_fd( struct file *file )
625 {
626 return get_unix_fd( file->fd );
627 }
628
629 struct file *grab_file_unless_removable( struct file *file )
630 {
631 if (is_fd_removable( file->fd )) return NULL;
632 return (struct file *)grab_object( file );
633 }
634
635 /* create a file */
636 DECL_HANDLER(create_file)
637 {
638 struct object *file;
639 struct fd *root_fd = NULL;
640 const struct object_attributes *objattr = get_req_data();
641 const struct security_descriptor *sd;
642 const char *name;
643 data_size_t name_len;
644
645 reply->handle = 0;
646
647 if (!objattr_is_valid( objattr, get_req_data_size() ))
648 return;
649 /* name is transferred in the unix codepage outside of the objattr structure */
650 if (objattr->name_len)
651 {
652 set_error( STATUS_INVALID_PARAMETER );
653 return;
654 }
655
656 if (objattr->rootdir)
657 {
658 struct dir *root;
659
660 if (!(root = get_dir_obj( current->process, objattr->rootdir, 0 ))) return;
661 root_fd = get_obj_fd( (struct object *)root );
662 release_object( root );
663 if (!root_fd) return;
664 }
665
666 sd = objattr->sd_len ? (const struct security_descriptor *)(objattr + 1) : NULL;
667
668 name = (const char *)get_req_data() + sizeof(*objattr) + objattr->sd_len;
669 name_len = get_req_data_size() - sizeof(*objattr) - objattr->sd_len;
670
671 reply->handle = 0;
672 if ((file = create_file( root_fd, name, name_len, req->access, req->sharing,
673 req->create, req->options, req->attrs, sd )))
674 {
675 reply->handle = alloc_handle( current->process, file, req->access, req->attributes );
676 release_object( file );
677 }
678 if (root_fd) release_object( root_fd );
679 }
680
681 /* allocate a file handle for a Unix fd */
682 DECL_HANDLER(alloc_file_handle)
683 {
684 struct file *file;
685 int fd;
686
687 reply->handle = 0;
688 if ((fd = thread_get_inflight_fd( current, req->fd )) == -1)
689 {
690 set_error( STATUS_INVALID_HANDLE );
691 return;
692 }
693 if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE )))
694 {
695 reply->handle = alloc_handle( current->process, file, req->access, req->attributes );
696 release_object( file );
697 }
698 }
699
700 /* lock a region of a file */
701 DECL_HANDLER(lock_file)
702 {
703 struct file *file;
704
705 if ((file = get_file_obj( current->process, req->handle, 0 )))
706 {
707 reply->handle = lock_fd( file->fd, req->offset, req->count, req->shared, req->wait );
708 reply->overlapped = is_overlapped( file );
709 release_object( file );
710 }
711 }
712
713 /* unlock a region of a file */
714 DECL_HANDLER(unlock_file)
715 {
716 struct file *file;
717
718 if ((file = get_file_obj( current->process, req->handle, 0 )))
719 {
720 unlock_fd( file->fd, req->offset, req->count );
721 release_object( file );
722 }
723 }
Windows API implementation